NYC-WTC_000200222

NYC 9/11 Public Portal Document

AMBIENT AIR AND DUST SAMPLING PROTOCOL for H.S. of Economics and Finance Page 6 of 8

2. Lead specific cleaner shall be utilized. 3. Re-test said areas following clean up. 4. Floor mats and/or other dust control devises shall be placed at points of entry. Actions 1,2 and 3 shall be repeated until satisfactory results are obtained.

SILICA AIR SAMPLES

• First floor lobby - one sample. • Fifth floor hallway, near elevators - one sample. • Tenth floor hallway, near staircase B - one sample.

All sample collected shall be analyzed utilizing the NIOSH 7500 method for respirable silica.

Since, there are no regulatory standards for Mineral Dust in non-industrial buildings, such as offices and schools at this time, the OSHA standard 1910.1000 TABLE Z-3 shall be utilized (per the request of PA consultant).

Results from samples collected shall be reported to BOE, UFT, School Principal and the PA consultant within 72 hours from the collection day.

In the event that unsatisfactory results are obtained, the following actions are to be implemented;

1. Perform general dust clean up of all areas/classrooms with unsatisfactory results. 2. Re-test said areas following clean up. 3. Floor mats and/or other dust control devises shall be placed at points of entry.

Actions 1.2 shall be repeated until satisfactory results are obtained.

DIOXIN WIPE SAMPLES ;

• First floor lobby - one sample. • Fifth floor hallway, near elevators - one sample. • Tenth floor hallway, near staircase B - one sample.

All sample collected shall be analyzed utilizing the EPA 8290 PCDD/DF Dioxin Furan method.

Results from samples collected shall be reported to BOE, UFT, School Principal and the PA consultant in 15 business days from the day of sampling.

In the event that any one sample result is unsatisfactory BOE will immediately notify the LIFT, the school principal, the school custodian and the PA consultant. The said parties will assess the situation and implement the appropriate response action(s).

PCB WIPE SAMPLES

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NYC-WTC_000200227